Abstract

Beam combining method is a promising technique for achieving energy scaling of solid-state lasers. The key technique of the coherent beam combining is the phase control of the stimulated Brillouin scattering wave. In previous works, the amplitude dividing scheme has shown more effective phase control than the wave-front dividing scheme. A recent experiment demonstrated that the phase stabilization in the wave-front dividing scheme can be improved by reducing the beam pointing fluctuation. In this work, a phase stabilization experiment is performed with the wave-front dividing four-beam combined amplifier. The phases are stabilized within with an amplified gain of 5.25.

Received 23 December 2009Accepted 04 March 2010Published online 02 April 2010

Acknowledgments:

This work was supported by the Nuclear Research & Development Program of the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korean government (MEST) (Grant No. M20090078160), and the International Atomic Energy Agency (IAEA) as a part of the coordinated research Project “Pathway to Energy from Inertial Fusion–An Integrated Approach” (Research Contract No. 13758/R0).